My fav. An open-source project held in GitHub (https://github.com/habari/habari). Current version is 0.9.1. It took me a while to notice there is a more decent template available already in the control panel. Their support is great, my problem was solved within an hour after creating an issue on the GitHub portal. Don’t be mislead by the number of stars on their GitHub repository (164 as on March 2014), this CMS is flawless and reacts fast to the requests.

“A stupidly simple, blazing fast, flat file CMS.” Doesn’t really have an admin module, neither control panel. It works by manually uploading .md files to a content directory on the server side. Their GitHub repository is https://github.com/gilbitron/Pico, and they already have 1216 stars (as on March 2014).

“Sophisticated, lightweight & simple CMS. Latest version: 1.5.0”. I just started using it recently, but it already looks very decent and powerful. Supports SqlLite, MySQL and PostresSQL. Runs on PHP 5.1+, checks on vulnerable PHP settings and inform about chaning them immediatly as ‘a must’ <Good Guy Bolt>